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SB 221-1985
Chinese Standard: 'SB 221-1985'
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SB 221-1985
English
199
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Days<=2
Plain Glass Spectacles
SB 221-1985
Obsolete
SB 221-1985
SIMILAR
Google-Books for your assessment (Full-PDF of
SB 221-1985_English
needs to be translated from scratch):
GB/T 38010.2-2021
GB/T 38010.3-2021
SB/T 10018-2017
SB/T 10021-2017